WEBVTT ND HAS BEENFOLLOWING THE STORY AND THE ROADTO RECOVERY.REPORTER: HOW ABOUT THIS PLAYFULTEN WEEK OLD TERRIER MIX.THEY CALL HIM THE PUPPY.BY LOOKING AT HIM NOW IT WOULDBE HARD TO COMPREHEND WHAT KINDOF SHAPE HE WAS IN ON FRIDAY,BUT THANKS TO UNIVERSITYVETERINARY SPECIALISTS THEYMANAGED TO TURN THIS LITTLEPUP'S LIFE AROUND.FOCUSE AND DETERMINED, THEPUPPY PLAYS FOR DAYS.>> HE'S A NORMAL PUPPY, HE'SBOUNCING AROUND.REPORTER: HIS PROGRESS AMAZESCHIEF VETERINARIAN MELT OFFICERDMITRI BROWN.>> IT'S A RARE CASE TO HAVE DOGSSURVIVE THIS KIND OF TRAUMA.REPORTER: CT SCANS SHOW WHERETHE FIVE INCH ROD MOVED THROUGHONE EYE ACROSS THE BRAIN AND OUTOTHER.>> IT WAS DISTURBING TO LOOK ATHIM.REPORTER: SHORTLY AFTER SURGERYHE LOOKED LIKE A DIFFERENTPUPPY.HE JUST COULDN'T GET ENOUGH ANDUVS COULDN'T GET ENOUGH OF HIM.SEEING THIS FACE AND PERSONALITYMAKES YOU THINK.>> WHAT MOTIVATES SOMEBODY TO DOTHAT TO A TEN WEEK OLD PUPPYTHAT OBVIOUSLY HAS NO DEFENSEAGAINST SOMETHING LIKE THAT.REPORTER: A WASHINGTON AREAHUMANE SOCIETY OFFICER SAYS THE

A playful 10-week-old terrier mix, the subject of animal cruelty, now bounces around as if nothing ever happened to him. It's hard to comprehend what he looked like on Friday, when he had a metal rod lodged in his head.